midwest: heartland of the nation - part 29 of 44. an examination of the many factors responsible for the wealth of the midwest. fertile soil and good climate provide an unrivaled agricultural output. iron ore pours out of the mesabi range and low cost sh - 金屬 個影片檔及 b 捲影像00:32
slow motion rooftop during torrential rain hail storm during summer monsoon season in the village of samachique chihuahua in the copper canyon region - 金屬 個影片檔及 b 捲影像00:30
flying through glittering particles - gold and blue version, loopable - abstract background - 金屬 個影片檔及 b 捲影像00:26散焦
montage objects floating in tray of mercury during laboratory demonstration of the density of this metal / united states - 金屬 個影片檔及 b 捲影像00:23
ms technician placing lithium ion cells used in automobile batteries on transport in prototype lab / troy, michigan, usa - 金屬 個影片檔及 b 捲影像00:25電池
cu pan zi technician places lithium ion cells used in automobile batteries on transport in prototype lab / troy, michigan, usa - 金屬 個影片檔及 b 捲影像00:19電池
cu zi technician places lithium ion cells used in automobile batteries on transport in prototype lab / troy, michigan, usa - 金屬 個影片檔及 b 捲影像00:13電池
1939 ms young navajo man giving silversmith deerskin and a blanket as payment for necklace / southwest united states / audio - 金屬 個影片檔及 b 捲影像00:22
slow camera pan left to right within a chinese factory in inner mongolia that processes the rare earth neodymium into alloy magnets - 金屬 個影片檔及 b 捲影像00:47
ms focus shift_overlooking shoulder of worker watching coworker polishing steel items - 金屬 個影片檔及 b 捲影像00:17
two heavy industry engineers stand in pipe manufacturing factory, use digital tablet computer, have discussion. construction of oil, gas and fuels transport pipeline. - 金屬 個影片檔及 b 捲影像00:12
heavy industrial press machine stamping and forming metal plates with precision in a modern manufacturing facility, showcasing the automated production line process - 金屬 個影片檔及 b 捲影像00:22
grain storage silos and agricultural infrastructure spanning cultivated farmland - 金屬 個影片檔及 b 捲影像00:20